(memberHandler: StringAdd).self
(memberHandler: StringFormat).self
(memberHandler: ArrowAssoc[MemberHandler]).x
(Since version 2.10.0) Use leftOfArrow
instead
(memberHandler: Ensuring[MemberHandler]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
Class to handle one member among all the members included in a single interpreter request.